Week 3, Chapter 4 - Charging Systems Flashcards
OVIP states what?
Ohmmeter, Voltmeter in Parallel
A ‘whine’ from under the hood, with the engine running, indicates what?
Leaking Diode
A ‘squeal’ from under the hood, with the engine running, indicates what?
Belt or Pulley
Name some of the components inside an electric voltage regulator.
Resistor, transister, thermistor, diodes, zener diodes, capacitors
Define a ‘solid state’
No moving parts
Rectification is changing ________ to ________.
AC, DC
True or False?
You can use full battery voltage to charge a field.
False
What is the name for the bundle of wires within a stator?
Windings
True or False?
The Alternator warning lamp will not light up if there is overcharge.
True
________ can cause longterm or permanent damage.
Overcharge
Insulated wires are run to the ________ side while non-insulated wires run to the ________ side.
Positive, Negative
True or False
An open within a field circuit will result in an absence of current.
True
Alternators induce voltage by rotating:
a. A magnetic field inside a fixed conductor
b. A conductor inside a magnetic field
c. A stator inside a field
d. A spring past a stator
a. A magnetic field inside a fixed conductor
In an alternator, induced voltage is at its maximum value when the angle between the magnetic lines and the looped conductor is at how many degrees?
90
The sine wave voltage induced across one conductor by one rotor revolution is called what?
Single-phase current
Alternating current in an alternator is rectified by ________.
Diodes
An alternator with only one conductor and one diode would show which current output pattern?
Half-wave Rectification
An alternator consists of:
a. A stator, a rotor, slip rings, brushes and diodes
b. A stator, an armature, slip rings, brushes and diodes
c. A stator, a rotor, a commutator, brushes and diodes
d. A stator, a rotor, a field relay, brushes and diodes
a. A stator, a rotor, slip rings, brushes and diodes
A typical automotive alternator has how many poles?
8 to 14
The three alternator conductors are wound onto a cylindrical, laminated metal piece called?
Stator Core
Automotive alternators that have three conductors generally use how many diodes to rectify the output current?
6
Which of the following is NOT true of the positive diodes in an alternator:
a. Connected to the insulated terminal of the battery
b. Conduct only the current moving from ground into the conductor
c. Mounted in a heat sink
d. The bias of the diodes prevent the battery from discharging
b: Conduct only the current moving from ground into the conductor
A group of three or more like diodes may be called a ________.
Diode Bridge
Y type stators are used in alternators that require what?
High voltage output at low alternator speed
True or False?
Delta type stators have a neutral junction.
False
Delta type stators are used when ________ output is needed.
High-Current
Which type of circuit is a commonly used type of field circuit in automotive alternators?
A-Circuit
Alternator output voltage is directly related to:
a. Field strength
b. Rotor speed
c. Both Field strength and Rotor speed
d. Neither Field strength or Rotor speed
c. Both Field strength and Rotor speed
Which of the following CANNOT be used in a totally solid-state regulator:
a. Zener diodes
b. Thermistors
c. Capacitors
d. Circuit breakers
d. Circuit breakers
Which component is used to smooth out any abrupt voltage surges and protect a regulator?
Capacitor
Which device is used to monitor the charging system?
Ammeter
Warning lamps are installed so that they will not light when:
a. The voltage on the battery side of the lamp is higher
b. Field current is flowing from the battery to the alternator
c. The voltage on both sides of the lamp is equal
d. The voltage on the resistor side of the lamp is higher
c. The voltage on both sides of the lamp is equal
A voltmeter in parallel with a load device, on a live circuit, is testing ________.
Voltage drop
